Disguised as a palace maid, Huo Xiangjiu sneaks into Muxi City to uncover her father’s disappearance — only to discover that the trusted court favorite Feng Mochen is a thousand-year fox demon.

During a rare full-moon tide, Huo Xiangjiu and Feng Mochen accidentally swap souls. Trapped in each other’s bodies, she uncovers tampered palace records — while demon hunter Bai Yu closes in.

As Bai Yu realizes the soul swap has bound their bodies together, he searches for a reversal spell. Meanwhile, Huo Xiangjiu and Feng Mochen struggle to survive palace life and each other.

Using Feng Mochen’s heightened senses, Huo Xiangjiu traces a suspicious scent to Princess Fu Ning, while a lost flower spirit seeks answers about her stolen body.

Crown Prince Fu Yingjun, jealous of Feng Mochen’s favor, attempts to recruit Huo Xiangjiu in a plot to eliminate him but under demonic control, she turns the tables.

When Fu Yingjun moves to arrest Huo Xiangjiu, Feng Mochen exposes the prince’s scheme before the Old City Lord. Meanwhile, the mystery of the flower spirit deepens.

To uncover the truth, Huo Xiangjiu infiltrates Princess Fu Ning’s palace — where eerie supernatural events hint that her father’s disappearance may be tied to something far darker.

Disguised as a butterfly, Feng Mochen investigates the palace hauntings while Bai Yu reluctantly joins forces to confront a greater threat. Suspicion turns toward the reclusive Old Madam.

With the Old City Lord’s support, Huo Xiangjiu returns to Princess Fu Ning’s side as her tutor. As their friendship grows, long-buried family secrets begin to surface.

Investigating the palace “spirit,” Huo Xiangjiu uncovers a painful truth behind the Old Madam’s abandonment of Princess Fu Ning but the mystery of her father remains unsolved.

When Princess Fu Ning collapses trying to reunite with her mother, Huo Xiangjiu, Feng Mochen, and Bai Yu expose a long-standing deception that shattered the royal family.

A scent test reveals a palace maid may have tampered with the records of Huo Xiangjiu’s father. As trust fractures, suspicion quietly shifts closer to the throne.

As canine spirits search the palace for clues, Crown Prince Fu Yingjun learns why Huo Xiangjiu’s father entered the palace and begins plotting to silence her.

When the spirit of her own failing organs confronts her, Huo Xiangjiu is forced to face the consequences of her reckless habits — even as political danger closes in.

Manipulated by false leads planted by Fu Yingjun, Huo Xiangjiu’s investigation spirals. Meanwhile, her failing health threatens her life in ways even magic cannot fix.

Centuries earlier, fox demon Feng Mochen loved a warrior named Hua Xi — whose tragic death still haunts him. In Huo Xiangjiu, he sees her face once more.

A suspect confesses to killing Huo Xiangjiu’s father but Feng Mochen uncovers inconsistencies, suggesting the truth is far more dangerous than a simple crime.

Princess Fu Ning helps Huo Xiangjiu confront the Crown Princess, revealing that her father entered the palace to accuse Fu Yingjun of corruption.

As assassination attempts intensify, Feng Mochen protects Huo Xiangjiu — even while enduring a heavenly tribulation that leaves her dangerously exposed.

Accused of being a demon, Feng Mochen faces a public trial with a relic designed to expose his true form but a carefully staged counterplan turns the accusation back on his enemies.

Pregnant and desperate to escape her abusive husband, the Crown Princess seeks Huo Xiangjiu’s help. A public confrontation leads to Fu Yingjun’s house arrest.

Buried evidence reveals the shocking truth: Gongsun Hao murdered Huo Xiangjiu’s father to cover up his crimes. As revenge unfolds, tragedy strikes the Crown Princess.

Betrayed and captured, Huo Xiangjiu becomes bait in a deadly scheme to expose Feng Mochen’s demon identity but an unlikely alliance with Bai Yu shifts the balance.

In a final confrontation, souls are swapped and crimes revealed. To protect Huo Xiangjiu, Feng Mochen prepares to sacrifice himself — until loyal demon Mao Jin intervenes at the ultimate cost.